A full understanding of the ap Huw manuscript will only be possible when the exact pitches of the strings named in the tablature are known. A variety of interpretations of the five guaranteed cyweiriau has resulted from following the instructions given by Robert ap Huw and Gwilym Puw, and those found in other treatises. The paper will propose a unified tuning cycle, which acknowledges additional information regarding crwth fingerings.
Bydd dealltwriaeth lawn o lawysgrif ap Huw ond yn posibl pan fydd union drawiau'r tannau a enwir yn y tablun yn wybyddus. Mae amrywiaeth o ddehongliadau o'r pum cywair a warentir wedi dod o ganlyniad i ddilyn y cyfarwyddiadau a roddir gan Robert ap Huw a Gwilym Puw, a'r rheini a geir mewn ysgrifau eraill. Cyniga Robert Evans gylch tiwnio unol, sy'n cydnabod gwybodaeth ychwanegol ynghylch byseddu crwth.